Wiring series and then parallel with switch

hemos · 30th October 2008, 03:27 PM

Hi guys,

Just decided to use 5x 6V SLA batteries in a portable setup I am building. I'm using the batteries at 30V but I would like to charge them at 6V using my SLA charger. I can't find any SLA charger made for 30V battery packs.

I'm wondering if any of you would be kind enough just to draw me the schematic I would need to build in order to be able to switch from series to parallel on these batteries.

Thanks,
Max

theAnonymous1 · 30th October 2008, 03:45 PM

Jerome Industries makes 15-cell (30V) lead acid chargers.

http://www.jeromeindustries.com/SLA-Switchmode.Htm

hemos · 31st October 2008, 02:38 PM

Tried emailing them and got no luck... I'll try to give them a call and see if they would sell me only 1 unit.

star882 · 2nd November 2008, 01:05 AM

What about build your own charger? It isn't that difficult for lead acid. All you need is a current limited supply switchable between two voltage limits. Just start by charging to 2.4v per cell under current limit, hold the voltage for a preset time when reached, and then fall back to 2.3v per cell.

hemos · 17th November 2008, 01:34 AM

If anyone have some spare time, I would be interested to purchase a custom made SLA charger for my 30V battery pack.

Max

30th October 2008, 03:27 PM	#1
hemos diyAudio Member Join Date: Oct 2006	Wiring series and then parallel with switch Hi guys, Just decided to use 5x 6V SLA batteries in a portable setup I am building. I'm using the batteries at 30V but I would like to charge them at 6V using my SLA charger. I can't find any SLA charger made for 30V battery packs. I'm wondering if any of you would be kind enough just to draw me the schematic I would need to build in order to be able to switch from series to parallel on these batteries. Thanks, Max

30th October 2008, 03:45 PM	#2
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Jerome Industries makes 15-cell (30V) lead acid chargers. http://www.jeromeindustries.com/SLA-Switchmode.Htm __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

2nd November 2008, 01:05 AM	#4
star882 diyAudio Member Join Date: Mar 2007	What about build your own charger? It isn't that difficult for lead acid. All you need is a current limited supply switchable between two voltage limits. Just start by charging to 2.4v per cell under current limit, hold the voltage for a preset time when reached, and then fall back to 2.3v per cell. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

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31st October 2008, 02:38 PM	#3
hemos diyAudio Member Join Date: Oct 2006	Tried emailing them and got no luck... I'll try to give them a call and see if they would sell me only 1 unit.

17th November 2008, 01:34 AM	#5
hemos diyAudio Member Join Date: Oct 2006	If anyone have some spare time, I would be interested to purchase a custom made SLA charger for my 30V battery pack. Max

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